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Create restclient interface
Refactoring of code to allow replace *restclient.RESTClient with any RESTClient implementation that implements restclient.RESTClientInterface interface.
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Eliminate half-baked multi-architecture support
**What this PR does / why we need it**:
We have release `kubeadm` with half-baked support for clusters with nodes of different CPU architectures. The problem with the code as it stand is that user will notice pending daemonsets of `kube-proxy` for machines with architectures that they don't have. At the same time, the code as it stand did not pick up correct images for architectures it wanted to allow. Additionally, it only treated `kube-proxy` in such a way, but didn't do anything about `kube-dns`. This removes multiple daemonesets, but ensures that whichever resources we deploy have node affinity set to the architecture native to the master. Users wishing to use mixed architectures can still create extra daemonsets via the API.
**Which issue this PR fixes**: fixes#33916
**Release note**:
```release-note
Remove support for multi-architecture code in `kubeadm`, which was released untested.
```
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CRI: Handle container/sandbox restarts for pod with RestartPolicy == …
If all sandbox and containers are dead in a pod, and the restart policy is
"Never", kubelet should not try to recreate all of them.
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Deny service ClusterIP update from `None`
**What this PR does / why we need it**: Headless service should not be transformed into a service with ClusterIP, therefore update of this field if it's set to `None` is disallowed.
**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes#33029
**Release note**:
```release-note
Changing service ClusterIP from `None` is not allowed anymore.
```
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add generic shared informer backed by existing informer
Adds the ability to get an informer and lister that returns `[]runtime.Object` methods with the "normal" filtering capabilities based on a `GroupResource`. Right now, it only works on known types (and re-uses those caches for efficiency by having a different skin on the `Index`). It should be extended in the future.
@derekwaynecarr I think this gives you the types you were looking for to avoid the ugly array copies.
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Support resourceVersion in GetToList - unify interface of List and Ge…
This pretty much unifies the interface of List() and GetToList() methods of storage interface.
I'm going to use it in a subsequent PR to improve performance of the whole cluster.
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Return an empty network namespace path for exited infra containers
If the infra container has already terminated, `docker inspect` will report
pid 0. The path constructed using the pid to check the network namespace of
the process will be invalid. This commit changes docker to report an empty
path to stop kubenet from erroring out whenever TearDown is called on an
exited infra container.
This is not a fix for all the plugins, as some plugins may require the actual
network namespace to tear down properly.
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Remove last probe time from replica sets
While experimenting with Deployment conditions I found out that if we are going to use lastProbeTime as we are supposed to be using it then we hotloop between updates (see https://github.com/kubernetes/kubernetes/pull/19343#issuecomment-255096778 for more info)
cc: @smarterclayton @soltysh
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Add an informer for StorageClass
Add an informer for `StorageClass` for later consumption in quota.
/cc @eparis @deads2k @erinboyd
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use LC_ALL=C on all sort commands
Most of these don't matter, but this makes it predicable no matter who runs the commands.
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Optimize label selector
The number of values for a given label is generally pretty small (in huge majority of cases it is exactly one value).
Currently computing selectors is up to 50% of CPU usage in both apiserver and scheduler.
Changing the structure in which those values are stored from map to slice improves the performance of typical usecase for computing selectors.
Early results:
- scheduler throughput it ~15% higher
- apiserver cpu-usage is also lower (seems to be also ~10-15%)
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kubeadm: Normalized reset command to match init and join commands.
**What this PR does / why we need it**: Overall, improves code structure. Opening single PR in order avoid big PRs in the future, when adding tests and new functionality, i.e. #34404.
```release-note
NONE
```
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Updating the GCI image to gci-dev-55-8872-18-0.
@jessfraz @fabioy @wonderfly @vishh
```release-note
Update the GCI image to gci-dev-55-8872-18-0
```
If the infra container has already terminated, `docker inspect` will report
pid 0. The path constructed using the pid to check the network namespace of
the process will be invalid. This commit changes docker to report an empty
path to stop kubenet from erroring out whenever TearDown is called on an
exited infra container.
This is not a fix for all the plugins, as some plugins may require the actual
network namespace to tear down properly.
Automatic merge from submit-queue
Add `--mounter-path` flag to kubelet that will allow overriding the `mount` command used by kubelet
In order to be able to use new mounter library, this PR adds the
mounterPath flag to kubelet which passes the flag to the mount
interface. If flag is empty, mount uses default mount path.
Mike Danese